/*
 * Copyright (c) Rafael Steil
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, 
 * with or without modification, are permitted provided 
 * that the following conditions are met:
 * 
 * 1) Redistributions of source code must retain the above 
 * copyright notice, this list of conditions and the 
 * following  disclaimer.
 * 2)  Redistributions in binary form must reproduce the 
 * above copyright notice, this list of conditions and 
 * the following disclaimer in the documentation and/or 
 * other materials provided with the distribution.
 * 3) Neither the name of "Rafael Steil" nor 
 * the names of its contributors may be used to endorse 
 * or promote products derived from this software without 
 * specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT 
 * HOLDERS AND CONTRIBUTORS "AS IS" AND ANY 
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, 
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL 
 * THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES 
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, 
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 
 * IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE
 * 
 * This file creation date: 27/08/2004 - 18:12:26
 * The JForum Project
 * http://www.jforum.net
 */
package net.jforum;

import java.io.BufferedWriter;
import java.io.IOException;
import java.io.OutputStreamWriter;

import javax.servlet.ServletConfig;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.jforum.exceptions.ExceptionWriter;
import net.jforum.repository.ModulesRepository;
import net.jforum.util.I18n;
import net.jforum.util.preferences.ConfigKeys;
import net.jforum.util.preferences.SystemGlobals;
import freemarker.template.SimpleHash;
import freemarker.template.Template;

/**
 * @author Rafael Steil
 * @version $Id$
 */
public class InstallServlet extends JForumBaseServlet {
	/**
	 * @see javax.servlet.GenericServlet#init(javax.servlet.ServletConfig)
	 */
	public void init(ServletConfig config) throws ServletException {
		super.init(config);
	}

	/**
	 * @see javax.servlet.http.HttpServlet#service(javax.servlet.ServletRequest,
	 *      javax.servlet.ServletResponse)
	 */
	public void service(HttpServletRequest req, HttpServletResponse response)
			throws ServletException, IOException {
		try {
			String encoding = SystemGlobals.getValue(ConfigKeys.ENCODING);
			req.setCharacterEncoding(encoding);

			// Request
			ActionServletRequest request = new ActionServletRequest(req);

			request.setCharacterEncoding(encoding);
			request.setJForumContext(new JForumContext(
					request.getContextPath(), SystemGlobals
							.getValue(ConfigKeys.SERVLET_EXTENSION), request,
					response, false));

			JForumExecutionContext ex = JForumExecutionContext.get();
			ex.setResponse(response);
			ex.setRequest(request);

			// Assigns the information to user's thread
			JForumExecutionContext.set(ex);

			// Context
			SimpleHash context = JForumExecutionContext.getTemplateContext();
			context.put("contextPath", req.getContextPath());
			context.put("serverName", req.getServerName());
			context.put("templateName", "default");
			context.put("serverPort", Integer.toString(req.getServerPort()));
			context.put("I18n", I18n.getInstance());
			context.put("encoding", encoding);
			context.put("extension", SystemGlobals
					.getValue(ConfigKeys.SERVLET_EXTENSION));
			context.put("JForumContext", request.getJForumContext());

			if (SystemGlobals.getBoolValue(ConfigKeys.INSTALLED)) {
				JForumExecutionContext.setRedirect(request.getContextPath()
						+ "/forums/list.page");
			} else {
				// Module and Action
				String moduleClass = ModulesRepository.getModuleClass(request
						.getModule());

				context.put("moduleName", request.getModule());
				context.put("action", request.getAction());

				BufferedWriter out = new BufferedWriter(new OutputStreamWriter(
						response.getOutputStream(), encoding));

				try {
					if (moduleClass != null) {
						// Here we go, baby
						Command c = (Command) Class.forName(moduleClass)
								.newInstance();
						Template template = c.process(request, response,
								context);

						if (JForumExecutionContext.getRedirectTo() == null) {
							response.setContentType("text/html; charset="
									+ encoding);

							template.process(context, out);
							out.flush();
						}
					}
				} catch (Exception e) {
					response.setContentType("text/html; charset=" + encoding);
					if (out != null) {
						new ExceptionWriter().handleExceptionData(e, out);
					} else {
						new ExceptionWriter().handleExceptionData(e,
								new BufferedWriter(new OutputStreamWriter(
										response.getOutputStream())));
					}
				}
			}

			String redirectTo = JForumExecutionContext.getRedirectTo();

			if (redirectTo != null) {
				response.sendRedirect(response.encodeRedirectURL(redirectTo));
			}
		} finally {
			JForumExecutionContext.finish();
		}
	}
}
